Schematics — Cm4 94v0
The schematic outlines how various high-speed interfaces are routed from the CM4 pins to physical ports:
The blueprint of the electron flow. A CM4 schematic details how the 200+ pins of the CM4 are routed to peripherals: USB, Ethernet, HDMI, PCIe, GPIO, and power regulation.
Designing a custom board (often labeled 94V-0) requires adhering to the specific pinout of the two high-density Hirose DF40 connectors on the underside of the CM4. A. Power Supply Requirements The CM4 module requires a strict
Ethernet and PHY (if not on-module)
Explicitly labeled lines for PCIe ( PCIE_TX_P/N ), HDMI, and Ethernet ( TRX_P/N ). These lines require specific trace impedance matching (usually 90 to 100 ohms) on the physical layout. cm4 94v0 schematics
This is not a model number . It is a UL 94 flammability rating issued by Underwriters Laboratories. A 94V-0 rating certifies that the plastic and fiberglass materials used to make the printed circuit board (PCB) will self-extinguish within 10 seconds during a fire test.
A standard CM4 carrier schematic must include the following blocks (all compatible with 94V0-rated laminate like FR-4):
When you see "94V-0" stamped on a Raspberry Pi CM4 or its carrier board, it refers to the established by Underwriters Laboratories.
USB 2.0 Hub, PCIe Gen 2 x1 lane, and standard GPIO headers. 3. PCIe and High-Speed Routing The schematic outlines how various high-speed interfaces are
While "94V-0" refers to the board's material properties, the are what you need for designing custom carrier boards or troubleshooting circuits. The Raspberry Pi Foundation provides comprehensive design files for the CM4 and its official IO board. Design Files - Raspberry Pi Compute Module 4 IO Board
A production-grade 94V0 design includes:
Raspberry Pi operates on an open-source hardware philosophy for its accessories. They provide full documentation freely online.
Power rail requirements (+12V, +5V, +3.3V, and global ground). This is not a model number
Downloading these schematics gives you a verified template for power delivery, USB hubs, HDMI buffering, and PCIe extraction.
The CM4 94V0 is a highly sought-after single-board computer (SBC) designed by Raspberry Pi Trading Ltd. As a variant of the popular Raspberry Pi 4 Model B, the CM4 94V0 boasts a compact form factor, impressive performance, and a wide range of applications. In this write-up, we'll delve into the CM4 94V0 schematics, exploring its design, components, and capabilities.
is the highest rating for vertical burn tests. It means that when the plastic or fiberglass substrate is exposed to a flame, burning stops within 10 seconds, and no flaming drips are allowed.
